Practice - Direct vs. Inverse Proportion
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Practice Questions
Test your understanding with targeted questions
If y is directly proportional to x, and y = 10 when x = 2, what is y when x = 4?
💡 Hint: Remember the formula y = kx; first find k.
In an inverse proportion, if y = 8 when x = 2, what is y when x = 4?
💡 Hint: Use the inverse proportion relation y = k/x.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What happens in a direct proportion?
💡 Hint: Think of a relationship where changes are together.
In an inverse proportion, what happens when one variable increases?
💡 Hint: Consider what happens to related variables.
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Challenge Problems
Push your limits with advanced challenges
If a car travels at 70 km/h, how far will it go in 4 hours? If another car travels at 140 km/h, how long before it reaches the same spot?
💡 Hint: First, calculate the distance using direct proportion, then apply inverse for determining time.
In the relationship of dose and weight, if 20mg is given to someone weighing 60kg, how much would a 90kg person receive?
💡 Hint: Establish the direct ratio and compare dosing ratios.
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Reference links
Supplementary resources to enhance your learning experience.